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dblistmodel.cpp
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dblistmodel.cpp
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#include "dblistmodel.h"
#include <QIcon>
/******************************************************************/
DbListModel::DbListModel(QObject *parent)
: QAbstractItemModel(parent)
{
d.header << tr("Connections");
}
/******************************************************************/
DbListModel::~DbListModel()
{
clear();
}
/******************************************************************/
QVariant DbListModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
return d.header.at(section);
}
if (orientation == Qt::Vertical && role == Qt::DisplayRole) {
return QString("Row %1").arg(section);
}
return QVariant();
}
/******************************************************************/
QModelIndex DbListModel::index(int row, int column, const QModelIndex &parent) const
{
if (!parent.isValid()) {
if (row < d.list.size())
return createIndex(row, column, d.list.at(row));
} else {
QObject *obj = static_cast<QObject*>(parent.internalPointer());
if (DbConnection *dbc = qobject_cast<DbConnection*>(obj)) {
if (dbc->db.isOpen()) {
if (row < dbc->tablelist.size())
return createIndex(row, column, dbc->tablelist.at(row));
} else if (dbc->connecterror.isValid()) {
return createIndex(row, column, (void*)&(dbc->connecterror));
}
}
}
return QModelIndex();
}
/******************************************************************/
QModelIndex DbListModel::parent(const QModelIndex &index) const
{
if (!index.isValid())
return QModelIndex();
QObject *obj = static_cast<QObject*>(index.internalPointer());
if (qobject_cast<DbConnection*>(obj)) {
// table entries have the root as parent
return QModelIndex();
}
if (DbTable *dbt = qobject_cast<DbTable*>(obj)) {
return createIndex(d.list.indexOf(dbt->dbconn), 0, dbt->dbconn);
}
if (DbError *err = qobject_cast<DbError*>(obj)) {
return createIndex(d.list.indexOf(err->dbconn), 0, err->dbconn);
}
return QModelIndex();
}
/******************************************************************/
int DbListModel::rowCount(const QModelIndex &parent) const
{
if (!parent.isValid()) {
return d.list.size();
} else {
QObject *obj = static_cast<QObject*>(parent.internalPointer());
DbConnection *dbc = qobject_cast<DbConnection*>(obj);
if (dbc) {
return dbc->numChildren();
}
}
return 0;
}
/******************************************************************/
int DbListModel::columnCount(const QModelIndex &parent) const
{
Q_UNUSED(parent)
return d.header.size();
}
/******************************************************************/
bool DbListModel::hasChildren(const QModelIndex &parent) const
{
if (!parent.isValid())
return true;
QObject *obj = static_cast<QObject*>(parent.internalPointer());
DbConnection *dbc = qobject_cast<DbConnection*>(obj);
return dbc;
}
/******************************************************************/
QVariant DbListModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
QObject *obj = (QObject*)index.internalPointer();
if (const DbConnection *dbc = qobject_cast<const DbConnection*>(obj)) {
if (role == Qt::DisplayRole) {
if (dbc->dbparam.label.isEmpty()) {
return "<no label>";
}
return dbc->dbparam.label;
} else if (role == Qt::DecorationRole) {
static QIcon dbicon(":/img/database.png");
return dbicon;
}
} else if (const DbTable *dbt = qobject_cast<const DbTable*>(obj)) {
if (role == Qt::DisplayRole) {
return dbt->tablename;
} else if (role == Qt::DecorationRole) {
static QIcon tableicon(":/img/table.png");
static QIcon tablesysicon(":/img/tablesys.png");
static QIcon viewicon(":/img/view.png");
if (dbt->tabletype == 0)
return tableicon;
else if (dbt->tabletype == 1)
return viewicon;
else if (dbt->tabletype == 2)
return tablesysicon;
}
} else if (const DbError *err = qobject_cast<const DbError*>(obj)) {
if (role == Qt::DisplayRole) {
if (index.row() == 0)
return err->driverText();
else if (index.row() == 1)
return err->databaseText();
} else if (role == Qt::DecorationRole) {
static QIcon erroricon(":/img/error.png");
return erroricon;
}
}
return QVariant();
}
/******************************************************************/
void DbListModel::clear()
{
if (d.list.isEmpty()) return;
for (DbConnection *dbc : qAsConst(d.list)) {
dbc->disconnect(this);
}
beginResetModel();
qDeleteAll(d.list);
d.list.clear();
endResetModel();
}
/******************************************************************/
void DbListModel::addDbConnection(const DbParameter &dbp)
{
beginInsertRows(QModelIndex(), d.list.size(), d.list.size());
d.list << new DbConnection(dbp);
endInsertRows();
}
/******************************************************************/
void DbListModel::editDbConnection(int num, DbParameter &dbp)
{
if (0 > num || num >= d.list.size()) return;
// close old connection and change parameters
d.list[num]->disconnect(this);
d.list[num]->dbparam = dbp;
emit dataChanged(createIndex(num, 0, d.list[num]),
createIndex(num, 0, d.list[num]));
}
/******************************************************************/
void DbListModel::delDbConnection(int num)
{
if (0 > num || num >= d.list.size()) return;
beginRemoveRows(QModelIndex(), num, num);
d.list[num]->disconnect(this);
delete d.list[num];
d.list.removeAt(num);
endRemoveRows();
}
/******************************************************************/
void DbListModel::saveToSettings()
{
QSettings settings;
settings.beginWriteArray("connections");
int i = 0;
for(auto dbc : qAsConst(d.list)) {
settings.setArrayIndex(i++);
dbc->dbparam.saveToSettings(settings);
}
settings.endArray();
}
/******************************************************************/
void DbListModel::loadFromSettings()
{
QSettings settings;
clear();
int connnum = settings.beginReadArray("connections");
for (int i = 0; i < connnum; ++i) {
settings.setArrayIndex(i);
DbParameter dbp;
dbp.loadFromSettings(settings);
addDbConnection(dbp);
}
settings.endArray();
}
/******************************************************************/
int DbListModel::getDbConnectionNum(const QModelIndex &index) const
{
if (!index.isValid()) return -1;
QObject *obj = (QObject*)index.internalPointer();
if (DbConnection *dbc = qobject_cast<DbConnection*>(obj)) {
return d.list.indexOf(dbc);
} else if (const DbTable *dbt = qobject_cast<const DbTable*>(obj)) {
return d.list.indexOf(dbt->dbconn);
}
return 0;
}
/******************************************************************/
DbConnection *DbListModel::getDbConnection(const QModelIndex &index) const
{
if (!index.isValid())
return Q_NULLPTR;
QObject *obj = (QObject*)index.internalPointer();
if (DbConnection *dbc = qobject_cast<DbConnection*>(obj)) {
return dbc;
} else if (DbTable *dbt = qobject_cast<DbTable*>(obj)) {
return dbt->dbconn;
}
return Q_NULLPTR;
}
/******************************************************************/
DbTable *DbListModel::getDbTable(const QModelIndex &index) const
{
if (!index.isValid())
return Q_NULLPTR;
QObject *obj = (QObject*)index.internalPointer();
if (DbTable *dbt = qobject_cast<DbTable*>(obj)) {
return dbt;
}
return Q_NULLPTR;
}
/******************************************************************/
void DbListModel::expanding(const QModelIndex &index)
{
if (!index.isValid()) return;
QObject *obj = (QObject*)index.internalPointer();
if (DbConnection *dbc = qobject_cast<DbConnection*>(obj)) {
if (!dbc->db.isOpen()) {
dbc->connect(this);
}
}
}
/******************************************************************/
void DbListModel::collapsed(const QModelIndex &index)
{
if (!index.isValid()) return;
QObject *obj = (QObject*)index.internalPointer();
if (DbConnection *dbc = qobject_cast<DbConnection*>(obj)) {
if (dbc->db.isOpen()) {
dbc->disconnect(this);
}
}
}
/******************************************************************/
void DbListModel::refresh()
{
for (auto dbc : qAsConst(d.list)) {
if (dbc->db.isOpen()) {
tablelist_clear(*dbc);
tablelist_load(*dbc);
}
}
}
/******************************************************************/
void DbListModel::tablelist_clear(DbConnection &dbc)
{
if (!dbc.tablelist.isEmpty()) {
beginRemoveRows(createIndex(d.list.indexOf(&dbc), 0, &dbc), 0, dbc.tablelist.size()-1);
qDeleteAll(dbc.tablelist);
dbc.tablelist.clear();
endRemoveRows();
}
if (dbc.connecterror.isValid()) {
beginRemoveRows(createIndex(d.list.indexOf(&dbc), 0, &dbc), 0, 1);
dbc.connecterror = QSqlError();
endRemoveRows();
}
}
/******************************************************************/
void DbListModel::tablelist_load(DbConnection &dbc)
{
tablelist_clear(dbc);
if (!dbc.db.isOpen()) return;
QList<DbTable*> newtablelist;
const auto userTables = dbc.db.tables();
for (const auto &table : userTables) {
newtablelist << new DbTable(&dbc, table, DbTable::UserTable);
}
const auto views = dbc.db.tables(QSql::Views);
for (const auto &table : views) {
newtablelist << new DbTable(&dbc, table, DbTable::View);
}
if (dbc.dbparam.showsystables) {
const auto sysTables = dbc.db.tables(QSql::SystemTables);
for (const auto &table : sysTables) {
newtablelist << new DbTable(&dbc, table, DbTable::SystemTable);
}
}
beginInsertRows(createIndex(d.list.indexOf(&dbc), 0, &dbc), 0, newtablelist.size()-1);
dbc.tablelist = newtablelist;
endInsertRows();
}
/******************************************************************/
void DbListModel::tablelist_seterror(DbConnection &dbc, QSqlError e)
{
tablelist_clear(dbc);
beginInsertRows(createIndex(d.list.indexOf(&dbc), 0, &dbc), 0, 1);
dbc.connecterror = e;
endInsertRows();
}
/******************************************************************/